Gear



April 21, 1925. 1,534,789

L. JUDELSCN GEAR Filed April 24. 192.31

Qwomtoz lows JuaEl so Patented Apr. 21, 1925.

UNITED STATES LOUIS JUDELSON, OF NEW YORK, N. Y.

GEAR.

Application filed April 24, 1924. Serial No. 708,698.

To all whom it may concern:

Be it known that I, LOUIS JuonLsoN, a

citizen of the United States, residing at the city of New York, in the county of Bronx and State of New York, have invented certain new and useful Improvements in Gears, of which the following is a specification.

' This invention relates to gears, and more particularly to an improved construction of a man le gear rack.

Machines requiring an element to be given rotary reciprocating or alternating movement from a continuously rotating element generally utilize some form of mangle-racks and pinion for such a purpose. Frequently, the end portions of such a rackbecome defective or broken in use and it is necessary to replace and discard the entire rack, as it is the common practice to cast the same as a single unit or cast it from a single continuous piece of metal.

The object of this invention is to provide a novel and improved construction of mangle-rack whereby only the defective or broken end portion may be replaced without requiring the replacement and discarding of the entire rack.

In this connection, a feature of'the invention is the provision of means to facilitate such replacement of end portions when necessary, and to rigidly hold the assembled pieces against displacement from their proper positions.

Another object of the invention is the provision of a composite gear of the character described having end portions that are formed of stronger material than the remaining portion in order to withstand the extra stress and strain to which such end portions are subjected in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of application will be indicated in the follow- 'ing claims.

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is a view in front elevation of a mounted mangle gear rack and its driving pinion showing one end portion of the rack in section and the other with the removable end displaced from ts normal position;

Fig. 2 is a plan view of that shown in- Fig. 1 with the replaceable ends in position;

Fig. 3 is a fragmentary perspective View of the end portion of the rack with the re placeable end withdrawn from its attached position.

Referring to the drawing, 10 is a driven shaft on which a mangle gear rod 11 is mounted to be driven by pinion 12 secured on driving shaft 13. Mangle gear rack 11 may have a portion or segment of its periphery removed and provided on its lateral surfaces with a continuous series of teeth as shown in Fig. 1.

Pinion 12 may mesh with mangle gear rack 11 to drive and cause rotary reciprocating movement through co-operative means such as end shattl and segmental guide plates 14. j v

Heretoii'ore racks such as 11 were cast as a single unit oi? iron or brass or cut from a single continuous piece of metal. A dominant feature of the invention consists in making a composite rack of a main member 11 and two end portions 11 The main member 11 may be formed of cast iron and the end portions ll fmade of a tougher material such as -steel to better withstand the extra stress and strains imposed on the end portions during operation.

End portions 11 may each be provided with a projecting stud 15 to fit into a hole 16 in body member 11, so that the teeth on the said ends and body portion are in proper alignment. To secure each end 11 against displacement, a tapered pin 17 may be provided which is driven into the body member 11 to pass through the stud 15. It is obvious that the ends 11 may easily be replaced when they are defective or broken.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent co-o aerate with a iinion com )rising a bodv member and replaceable end portions.

8. In a rotary reciprocating gearing, a mangle gearrack having a continuousseries of teeth on its lateral surfaces adapted to cooperate with a pinion,comprising abody member and replaceable end portions and means to secure th end portions to the body member in position for aligning the teeth.

a. In :a rotary reciprocating gearing, a

mangle gear rack having a continuous series of teeth on its lateral surfaces adapted to co-operate with a pinion, comprising a body member and'replaceable end portions, and a projecting stud on each end portion, said body'member being provided With holes in the body member for receiving each stud to secure the end portions to the body portion in position for aligning the teeth.

5. In a rotary reciprocating gearin a mangle gear raclrhaving a-continuous series of teeth on its lateral surfaces adapted to co-operate with a pinion, comprisinga body member and replaceable'end portions, a projecting stud on eachend portion, said body member being provided with holes in the body member for receiving each stud to secure'the end portions to'the body portion in position for aligning the teeth, and means for holding said end portions against displacement.

6. In a rotary reciprocating gearing, a mangle gear rack having a continuous series 01 teeth on its lateral surfaces adapted to co-operate with a pinion, comprising a body member and replaceable end portions, a projectin stud on each end portion, said body member being provided with holes in the body member for receiving each stud to secure the end portions to the body portion in position for aligning the teeth, and a pin fitted in the body member and passing through said stud for holding the end portions against displacement.

T. In a rotary reciprocating gearing, a mangle gear rack having a continuous series of teeth on its lateral surfaces adapted to co-operate \vitha pinion, comprising a body member and replaceable end portions, said body member being of cast metal and said end portions formed of a tougher material than the body member to withstand the increased stress and'strain imposed 'When the pinion passes over the end portion.

8. in a niangle gear ra k having continuous row of teeth on its lateral surface,

a replaceable end comprising substantially the equivalent of the normal rounded toothedend portion of said rack, and an interlocking means on said end adapted to securely fasten the latter to the toothed body portion of said raclrivith the teeth in proper alignment.

In testimony whereof I allix my signature.

LOUIS JUDELSON. 

